Mathias beckers



(No Model.)

M. BEGKERS.

ELECTRIC BOILER ALARM.

No. 461,178. Patented Oct. 13,1891.

'fav-nef.

UNITED STATES PATENT OFFICE.

MATHIAS BECKERS, OF LANGERIVEIIE, GERMANY.

ELECTRIC' BOlLER-ALARM.

SPECIFICATION forming part of Letters Patent No. 461,178, dated October13, 1891.

Application filed December 24, 1889. Serial No. 334,887- (No model.)

To all whom it may concern:

Be it known that I, MATHIAS BEoKERs, a subject of the German Emperor,residing at Langerwehe, in Germany, have invented certain new and usefulImprovements in Control Apparatus, of which the following is aspecication.

This invention is especially adapted as a boiler-alarm in which anoscillating horsesl1oemagnet is actuated by a magnetic oat-,whereby analarm can be given when the liquid is either too low or too high.

In the accompanying drawings, Figure l is a side View of a water-gagewith the entire apparatus. Fig. 2 is a view of the water-gage with theapparatus in section. Fig. 3 is a top view of the apparatus after thecover of the box is taken away. Figfl is a top view, Fig. 5 a section,and Fig. 6 a side view, of the apparatus, which is closed in a metal boxin a large scale.

This device chiey comprises a clamp a, which is fixed by means ot thesetscrew a upon the packing-nut of h, the lower tap of the water-gage.The outer end of the clamp is provided with a guide c, resting upon avertical rod b and capable of being xed in any suitable position by theset-screw d. Upon this guide rests a metal box c, which is movable toand fro and contains a horseshoe-mag net f, capable ot' oscillating upona pin 7u. The connection of the box with the watergage is such that themark indicating the lowest level of the water should be at the sameheight as tho center of the two branches of the magnet. Thehoreshoe-magnet is so placed that its branches are.situated one abovethe other. On one side of the boX near the magnet is arranged at n aweak insulated spring fi, which is insulated at n and placed incommunication with a source of electricity by the binding-screwc, Fig.3, with the front end t" bent over. In the water gage is placed a metalbox s, fioating upon the top of the water contained therein andinclosing a permanent magnet. The latter is so arranged in the float sthat when the upper branch, for instance, of the horseshoe-magnet formsthe north the lower pole .of the magnet contained in the float islikewise a north pole, while its upper pole, on the contrary, forms thesouth pole. The result thereof is that when the oat sinks the two northpoles come first opposite to one another, and hence the branches of thehorseshoe-magnet are repelled. The water continuing to sink to itslowest level, the south pole of the magnet inclosed in the float s nowcomes opposite the north pole of the horseshoe-magnet at the same timethat the north pole of the former moves opposite the south pole ot' thelatter, thus causing a powerful attraction of the branches of thehorseshoe-magnet, in consequence whereof the said horseshoe-magnet iscaused to oscillate upon the pin or pivot is, its upper end pressing thebent-over end t" of the springe' against the side of the boX, whereby asthe said box is in electric communication with the battery a doublecontact is formed, lirstly through the spring z' and secondly throughthe box, the result being the production of a stron g signal.

I declare that what I claim is- In water-level indicators forsteam-boilers, a clamp a, with rod o and guide c, in which moves the boxe, fixed in any suitable position by the set-screw d and containing thehorizontallyoscillating horseshoe-magnet f, circuit terminals actuatedby the oscillating horseshoe-magnet, and a magnetic float t'or actuatingthe said magnet.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

MATHIAS BECKERS.

Witnesses:

GUsrAvE ALBERT OELRIcHs, OTTO von Auw.

